<template>
  <div class="login_container">
      <div class="login_box">
          <!-- 头像区域 -->
          <div class="avatar_box">
            <img src="../../assets/logo.png" alt="">
          </div>
        <!--  登录表弟区域  -->
        <el-form ref="LoginFormRef" :model="LoginForm"  :rules="LoginFormRules" label-width="0" class="login_form">
          <!-- 用户名 -->
          <el-form-item prop="username">
            <el-input
              prefix-icon="iconfont icon-user"
              v-model="LoginForm.username"
            ></el-input>
          </el-form-item>
          <!-- 密码 -->
          <el-form-item prop="password">
            <el-input
              show-password
              prefix-icon="iconfont icon-3702mima"
              v-model="LoginForm.password"
            ></el-input>
          </el-form-item>
          <!-- 按钮区域 -->
          <el-form-item class="btns">
            <el-button type="primary" @click="Login">登录</el-button>
            <el-button type="info" @click="resetLoginForm">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
  </div>
</template>

<script>
export default {
  name: 'login',
  data () {
    return {
      // 这是登录表单的数据绑定对象
      LoginForm: {
        username: 'admin',
        password: '123456'
      },
      LoginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置登录表单
    resetLoginForm () {
      console.log(this)
      this.$refs.LoginFormRef.resetFields()
    },
    Login: function () {
      this.$refs.LoginFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) {
          // return
        } else {
          const { data: res } = await this.$http.post('login', this.LoginForm)
          if (res.meta.status === 200) {
            this.$message.success(res.meta.msg)
            // console.log(res.data.token)
            // 1. 将登录成功之后的 token，保存到客户端的 sessionStorage 中
            //   1.1 项目中出了登录之外的其他API接口，必须在登录之后才能访问
            //   1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
            window.sessionStorage.setItem('token', res.data.token)
            // 2. 通过编程式导航跳转到后台主页，路由地址是 /home
            this.$router.push('/home')
          } else {
            this.$message.error(res.meta.msg)
          }
        }
      })
    }
  }
}
</script>

<style scoped lang="less">
.login_container{
  background-color: #2B4B6B;
  height: 100%;
}
.login_box{
  max-width: 100%;
  width: 450px;
  height: 300px;
  background-color: #FFFFFF;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
  box-shadow: 0 0 10px #ddd;
  .avatar_box{
    width: 130px;
    height: 130px;
    border: 1px solid #ddd;
    border-radius: 50%;
    padding: 10px;
    position: absolute;
    top: 0;
    background: #FFFF;
    left: 50%;
    margin: auto;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 10px #ddd;
    img{
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #efefef;
    }
  }
}
.btns {
  display: flex;
  justify-content: flex-end;
}
.login_form{
  position: absolute;
  bottom: 0;
  padding:0 20px;
  width: 100%;
  box-sizing: border-box;
  margin: auto;
}
</style>
